Journal
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
Volume 5, Issue 11, Pages 1909-1916Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jz5006863
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Funding
- DRDO [ERIPR/ER/1000389/M/01/1407]
- DST [SR/WOS-A/CS-92/2012(G)]
- CSIR
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We report a systematic study of the electron-transfer process from CdSe quantum dots (QDs) to the Au tips as a function of the QD diameter and also the size of the Au-tip. For Au-tips smaller than similar to 3 nm, that is, when they are still not metallic, a reduction in PL behavior is observed as the excited electrons are transferred from the QD-conduction band to Au, with quenching being higher for larger tips and smaller QDs. A combination of steady state and time-resolved studies establish the mechanism of charge transfer that is further confirmed by dye-degradation studies, showing the possibility of ambient day light photocatalysis.
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